Does any one have an alregy or ever had a reaction to a cephalosporin antibiotic?

Yes, I've had a anaphylactic reaction to Duricef. Actually, this reaction was the worst one I'd ever had.

I'm not sure whether you're worried that you're having an allergic reaction, but if you're concerned, you should always immediately go to the ER just to be safe.

It is not uncommon to have a bad reaction to Cephalosporin as they are very strong antibiotics amd are in the sulphonomide class and people are more likely to react to sulphonimides than other antibiotics.

I don't know why you were given these, but there are much better antibiotics around these days that should not give you such a bad reaction.